Article View: comp.lang.postscript
Article #564Important safety tip
From: Amanda Walker
Date: Tue, 13 Jun 1989 13:07
Date: Tue, 13 Jun 1989 13:07
44 lines
2100 bytes
2100 bytes
It seems user defined fonts (FontType 3) are a little more magical than they
appear. Consider the following piece of PostScript code:
--------------------------
8 dict begin
/FontType 3 def
/FontMatrix [.001 0 0 .001 0 0] def
/FontBBox [0 0 1000 1000] def
/BaseFont /Courier findfont [800 0 0 1000 0 0] makefont def
/Encoding 256 array def
StandardEncoding Encoding copy
/String 1 string def
/StrokeWidth 40 def
/BuildChar {
exch begin
BaseFont setfont
String exch 0 exch put
String stringwidth
StrokeWidth setlinewidth
1 setlinecap
newpath 0 0 moveto String false charpath pathbbox
setcachedevice
newpath 0 0 moveto String false charpath stroke
end
} def
currentdict
end /Courier-Compressed exch definefont pop
--------------------------
This creates a font that is based on Courier, but is compressed by 80%
horizontally, and with the stroke weight beefed up a little. Pretty
simple, right? Intending to keep this font as small as possible, I
tried removing the definition for /Encoding, but definefont objected.
So, I tried "/Encoding [] def" instead, since I don't actually use the
encoding vector for anything. "definefont" took it, but when
I tried to show some text with it, my LaserWriter sent back "Fatal System
Error at 0Xnnnnn" where nnnnn is a hexadecimal number I didn't write
down, and then promptly rebooted itself.
Is this a known bug in PostScript 38.0?
--
Amanda Walker <amanda@intercon.UUCP>
--
"Some of the worst mistakes in history have resulted from trying to apply
methods that work fine in one field to another where they don't." -James Hogan
Technical Details
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Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!intercon!amanda@intercon.UUCP From: amanda@intercon.UUCP (Amanda Walker) Newsgroups: comp.lang.postscript Subject: Important safety tip Keywords: Chernobyl fonts Message-ID: <13-Jun-89.091841@192.41.214.2> Date: 13 Jun 89 13:07:11 GMT Sender: news@intercon.UUCP Reply-To: amanda@intercon.UUCP (Amanda Walker) Organization: InterCon Systems Corporation Lines: 44